Bucket with scraper



Aug. 23, 1966 N. A. DROUILLARD BUCKET WITH SCRAPER 5 Sheets-Sheet 1 Filed July 1, 1965 1966 N. A. DROUILLARD 3,268,100

I BUCKET WITH SCRAPER Filed July 1, 1965 5 Sheets-Sheet 2 F|G.3 FIG. 4

MK. W

Aug. 23, 1966 N. A. DROUILLAR D BUCKET WI TH S CRAPER 3 Sheets-Sheet 5 Filed July 1, 1965 FIG. 5

United States Patent 3,268,160 BUEKET WITH CRAPER Norman A. Drouillard, 1600 Cavalry, Detroit 9, Mich. Filed July 1, 1965, tier. No. 468,878 1 Qlaiin. (Cl. 214-138) This invention relates to an improved excavating device and to a new and novel scraper for removing dirt which has accumulated in the excavator bucket.

Scrapers which have been previously designed for use in excavators have the drawback of being complicated in operation besides being limited solely to the function of cleaning out the excavating bucket. Furthermore, in excavating operations a changeover in digging components is usually required by the nature of the work, variations in the material under excavation, and in weather conditions. These changeovers reduce the capacity of the excavator and require a rescheduling the work or idling of operating personnel. The presence of an additional different excavator will overcome some changeover problems, but this entails the dificulty of maintaining extra equipment on hand which could be usefully employed elsewhere. Consequently a need exists for a simplified scraper which can also add versatility to conventional equipment.

One object of the invention is to provide a new and novel scraper for excavator buckets.

Another object of this invention is to provide a versatile excavator requiring no changeovers during the digging operation.

Other aspects of the invention will become apparent from the description to follow.

The excavator of this invention includes a dipper stick,

an open ended excavating bucket pivotally mounted at a the end of the dipper stick, the sides of the bucket being parallel, means adapted to rotate the bucket about the pivotal mounting, and a scraper rigidly mounted at the end of the dipper stick, the bucket being adapted for rotation about the scraper whereby the scraper removes material contained in the bucket.

Some aspects of the invention will become apparent from the drawings in which:

FIGURE 1 shows a cross section of a bucket in a neutral position with respect to the scraper.

FIGURE 2 is a sectional view of FIGURE 1 taken along the line 22.

FIGURES 3-5 show different section views of the bucket and scraper for various excavating operations.

The excavating portion of an excavator is shown in FIGURE 1 as having a boom 1, a dipper stick 2 rotatably mounted about the boom at pivot 3, and a bucket 4 rotatably mounted about the dipper stick at pivot 11. The scraper 5 is shown rigidly positioned at the end of the dipper stick and making a fairly close fit between the parallel sides of the openended bucket. Hydraulic means 6 is provided to raise and lower the dipper stick, through cable 7 while hydraulic means 8 is provided to rotate the bucket about the end of the dipper stick through links 9, 10.

In operation the bucket is lowered to the ground as in FIGURE 5, and a load of earth is scraped up; the bucket then is swung over to the desired dumping position and rotated about the scraper. This forces the bucket to unload irregardless of the material involved. It will be noted that no additional hydraulic system is required for operating the scraper, the operator is not burdened with handling an additional control, and the absence of a scraper actuating mechanism eliminates the need for mechanical servicing and eventual replacement.

When the excavator is used for a shovel front operation, the unit is lowered to the earth as in FIGURE 3. The bucket is rotated exposing the scraper as shown in FIG- URE 4, so that a forward motion of the dipper stick moves the scraper along a clearing path. The scraper in the exposed position can also be used for scraping, levelling, grading, pushing heavy objects, breaking frost and concrete and forming a clean vertical face along the side of an excavation.

In the prior art scrapers where some form of actuation is usually employed, the scraper is moved by arms mounted medially of the scraper to obtain optimum rigidly. However, the presence of these arms will prevent the scrapers from being driven into the ground and consequently limits their usefulness. Also the presence of these arms usually requires that the scraping of the bucket be carried out from one side only and this imposes an unequal wear on the overall operation of the bucket discharge. A further limitation of the usefulness of prior art scrapers for use externally of the bucket is due to their curved motion. The present device is free from this type of one-sided operation and hence over a period of time wear on moving parts is distributed more equally.

For use as a clam bucket, the bucket is activated to the position in FIGURE 4 and the scraper is driven into the ground. The bucket is rotated to the position shown in FIGURE 5 thereby securing the load inside the bucket, the scraper now acting as an end closure. Discharge of the load is accomplished as before, by rotating the bucket about the scraper. The same principle of operation applies for moving or hoisting an object.

In certain excavating operations, the scraper may be positioned at one end of the bucket to avoid spillage where the material is of free-flowing nature such as sand.

It will thus be seen that the device affords a simplification of prior art scrapers by eliminating costly manipulating mechanisms and increasing the versatility of the excavator both with regard to the digging operation and the reduction :or elimination of changeover requirements.

.I claim:

A multi-purpose excavating bucket comprising in combination a boom, a dipper stick mounted on the boom, an open ended excavating bucket pivotally mounted at the end of the dipper stick, the sides of the bucket being parallel, a scraper rigidly mounted at the end of and extending linearly from the dipper stick, said scraper being adapted for excavation and means adapted to rotate the bucket about the dipper stick, the bucket being adapted to rotate about the scraper whereby the scraper removes material contained in the bucket, the bucket rotation being of sufficient degree to expose the dipper stick for excavation purposes when desired.

References Cited by the Examiner UNITED STATES PATENTS 1,653,905 12/1927 Harrison 214-146 2,742,165 4/1956 Pilch 214-138 HUGO O. SCHULZ, Primary Examiner.

Patented August 23, 1966 V 

